Topcon DL-501 Instruction Manual page 111

SD card is write protected.
SD card is write protected. Data cannot be written to the SD card. Cancel write protection or use
a different SD card.
SD card record is stopped. Continue?
Data cannot be written to the SD card despite "SD mirroring" being set to "On", perhaps because
the SD card is not inserted correctly.
Press [YES] to write data to the internal memory only (subsequent recording to the SD card will
not be possible for this route).
SD card record is stopped.
Data cannot be written to the SD card despite "SD mirroring" being set to "On", perhaps because
the SD card is not inserted correctly. Writing to the SD card has been cancelled.
Selected JOB contains route data.
Cannot restore to selected JOB id. Selected JOB id already contains JOB data. Select an empty
JOB.
Sigma Hd diff. over!
The total difference in foresight and backsight distance is outside the range (Total dist diff.) set in
route settings.
Staff too far
Move the staff to within the measuring range distance.

"25. SPECIFICATIONS"
Start info.record full!
No more start info. can be recorded.
Delete unnecessary JOB or route data and try again.
Start info.record full in current route!
No more start info. from the current route can be recorded.
The battery for the clock function needs to be replaced.
The voltage of the lithium battery has decreased, the battery itself is depleted, and the date/time
display is incorrect.
An error will occur temporarily on the lithium battery when the instrument is powered on using a
battery with little remaining power. In this event, re-configure the date/time settings

"19.5 Date and Time"
When a message is constantly displayed upon startup the lithium battery needs to be replaced.
For details on replacing lithium batteries contact your local dealer.
The capacity of the SD card is insufficient.
Remaining memory capacity of the SD card is not enough to save data. Insert a new SD card or
delete unnecessary data from the current SD card.
The capacity of the USB is insufficient.
Remaining memory capacity of the USB memory device is not enough to save data. Insert a new
device or delete unnecessary data from the current device
20. WARNING AND ERROR MESSAGES
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